Should the needle valve have a wire/spring attaching it to the float? The value has a groove around the bottom end like there should be something attached to it.I have looked at several kits (the parts scheme) and none show a wire/spring.

The purpose of the wire is to pull the needle down as the float lowers. I have not seen one on a Cub but if it would fit, it would be potentially helpful in preventing a stuck needle The fuel pressure is quite low on gravity systems and the needle depends mostly on gravity to open it. With fuel pump systems, the line pressure helps open the needle.

Thanks everyone for the info, evidentally the carb on this cub does not need a spring. it set in the shop for two years without being started so when it would not start it , I thought I remembered there being a spring attaching the valve to the float . Anyway long story short ,after a thorough cleaning and reassembly of the carb, the old cub fired on the first try. Sounds sweet!! Brazos